Harley Davidson Ironhead Sportster Fork Oil Change

Posted in: Brass by shovelhead13 on March 20th, 2011 | 0 Comments

Harley Davidson Ironhead Sportster models to 1972 do not require periodic oil changes, accept in the event of oil leakage or contamination. Models from 1973 require that fork oil be changed at 5,000 mile intervals. Here is how the fork oil change can get done.

                                               

Harley Davidson Ironhead Sportster Fork Oil Change Start

The Harley Davidson Ironhead Sportster fork oil change drainage starts out by draining the forks. To drain fork oil proceed as follows. Place a suitable drain pan under the fork lower end. Remove fork tube cap. Remove the drain plug that is towards the bottom of the fork slider and washer. Loosen tube end bolt several turns. Move shockabsorber up and down with a screw driver to loosen sediment. Once the drainage is over replace drain plug and tighten tube end nut. Why shouldn’t some thing like a cat litter box help?

Harley Davidson Ironhead Sportster Fork Oil Change Works

The Harley Davidson  Ironhead Sportster fork oil change works as the fork legs get refilled.  Refill a fork leg through fork tube cap. Harley Davidson type B fork oil is recommended for refill. If fork has been over hauled refill with “dry” quantity. Otherwise refill with “wet” quantity. Why shouldn’t Ironhead Sportster forks get over hauled when needed?

Harley Davidson Ironhead Sportster Fork Oil Change Quantity

This Harley Davidson Ironhead Sportster fork oil change quantity table lists how many ounces are used per year.  1) 1957-1967 gets 3 1/2 onces wet or 4 1/2 ounces dry. 2) 1968-1972 gets 5 1/2 ounces wet or 6 1/2 ounces dry. 3) 1973 and later gets 5 ounces wet or 6 ounces dry. Why shouldn’t custom motorcycle riders know how much fork oil needs to be used?  

Harley Davidson Ironhead Sportster Fork Oil Change Filler

A Harley Davidson Ironhead Sportster oil change filler can be improvised like this. A rubber bottle stopper can fit into the fork tube cap. Some metal tubing can be used into the bottle stopper. Some flexible tubing can run from the metal tubing in the bottle stopper up to another small piece of metal tubing. A funnel can be used into that top pieces of metal tubing. A filler can is used to get the fork oil into the fork leg. Why should one have to buy some expensive tool that helps change Ironhead Sportster fork oil? 

Harley Davidson Ironhead Sportster Fork Oil Change Inspection

A Harley Davidson Ironhead Sportster fork oil change inspection must get done after the oil change is finished. If there is appreciable oil leakage, or the fork does not work properly before or after some Ironhead Sportster fork oil change proceed as follows. Check and correct fork oil level by draining and refilling each fork leg. Excess oil will result in oil leakage. Insufficient oil will result in faulty damping. Examine drained oil for water. Water can cause fork oil to leak past fork slider bushings and seals or leak from fork tube cap. An imperfect fit at fork upper tube taper may cause leakage. This situation may be remedied by applying sealer to fork tube cap threads. Check slider oil seals for damage or wear. On 1972 or earlier models inspect fork tube breaker valve. To do so remove fork tubecap, submerge it in water, then blow compressed air through it. Replace breaker valve if it leaks at less than 15 PSI pressure. If fork operation is still unsatisfactory disassemble fork to locate problem. Why shouldn’t mechanical mysteries be solved by every custom motorcycle rider? 

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